Glass-beveling machine



(No Model.)

B. R. NEWTON; GLASS BEVELING MACHINE.

2 Sheets-Sheet Patented Mar. 18

WITNESSES.

2 Sheets-Sheet 2.

(No Model.)

B. R. NEWTON. GLASS BEVELING MACHINE.

Patented Mar. 18, 1890.

UNITED STATES PATENT OFFICE.

RICHARD REEVE NElVTON, OF RAHVAY, NElV JERSEY.

GLASS-BEVELING MACHINE.

SPEGIFTH'J.A'IION forming part of Letters PatentNo. 423,799, dated March 18, 1890.

' Application filed June 15, 1889. SerialNo. 314,392. (No model.)

To all whom it may concern/.-

Be it known that I, RICHARD REEvE NEW- TON, a citizen of the United States, and a resident of Rahway, in the county of Union and State of New Jersey, have invented a certain new and useful Machine for Beveling Plate-Glass and other Substances, of which the following is a specification.

Figure l is a side elevation of my improved glass-beveling machine, and Fig. 2 is a front elevation with the platen and grindingframe removed to show the construction of the rear parts. Fig. 3 is a sectional view of the grinding-frame, slide, and base, the section being taken on line m, Fig. 1. Fig. 4 is an edge view of a portion of the table and clamping devices, and Fig. 5 is a plan view of the same.

My invention relates to a machine for grinding bevels on glass; and it consists in an improved holding and carrying device which may be adjusted to give any desired bevel, in an improved frame for the grinding-wheels, and in novel combinations, as are hereinafter set forth, and pointed out in the claims.

The object of my invention is a machine which may be rapidly and conveniently adjusted to the work ofgrinding and polishing bevels on the larger plates of glass with little danger of fracture.

To enable others to make and use my improved machine, I will give a description of the same in detail, reference being. had to the drawings hereto annexed.

The parts of the machine are arranged on a bed-plate A, the plan of which is T-shaped. The forwardly-extending arm of the T has a raised part a, in which the part B slides. On the rear part of the bed two uprights O are fastened, to which the ways D and parts of the'shipping device are attached. The uprights have a gap a short distance from the base, so that the toothed segments S on the table E may pass by when the table is lowered for long bevels. The ways D, in which the rolls on the carriage travel, are V-shaped,

suificiently ribbed to obviate deflection, and

are held to the uprights by suitable screws. The lower way is provided with gib-screws in ears on both uprights to take up wear, and the upper way is secured and remains in place. The cross-brace h, Fig. 2, fastened to the inner sides of the uprights, has a T-shaped piece on it midway between the uprights on which the part c of the shipping device slides. The part c has on its upper side a pendulum cl, against which the stops or dogs 6 on the carriage F strike,thereby reversing the beltshifter, and may be turned back on its axis, so that it will not engage with the dogs 6. On the under side of the part a one end of a square rod is fastened, the other end of which passes through a box on the upright and terminates in a handle. The rod has rack-teeth out in it near the handle end, which mesh into a pinion g, thereby driving the beltshifter 70 by the intermediate shaft f f, Figs. 1 and 2. m

The carriage F is a rectangiilar frame. On its rear upper and lower sides pillars are raised, in which the axles of the rolls G are fastened, and a short distance above the middle on the rear side is a bar, T-shaped in crosssection, on which are two dogs or stops e, which may be adjusted at the will of the operator to limit the reciprocating motion of the carriage. The upper front side of the carriage is adapted to have the table E hinged to it, and nearthe lower side in front are fastened journals for the shaft 71. On the lower side underneath is the rack 2', which has the teeth out in it throughout its length, by means of which the carriage is driven by the pinion j.

The rolls G are V-shaped on the periphery and move in the ways D, turning on axles driven into the pillar on the carriage. The shaft it has several pinions H fastened to it at intervals, and a ratchet-wheel I, with a handle on one end. A pawl pivoted to the frame engages with the ratchet to prevent its backward rotation. Instead of a ratchet and pawl a worm and worm-wheel may be substituted.

The pinion j, with its shaft, is driven by a train of wheels from the driving-p ulley, which is driven in the well-known way by open and cross belts.

The table E, Fig. 1, is' rectangular and is hinged near its upper side to the carriage F. Along the lower edge there is a ledge, against which the glass rests, and near each end, and, if desired, at intervals between, are T-slots J, Fig. 5, at right angles to the lower side. The toothed segments S are attached to the rear surface of the table, correspondingin number and position laterally to the pinions II on the shaft 71, and by these, in connection with the pawl and ratchet, the table is held so that any angle within the limit of the machine may be obtained. The surface of the glass rests on cushions I, attached to slotted strips m, which are bolted to the table and may be set at any distance from the ledge, as shown in Figs. 1, 4, and 5. Cushioned straps n are employed to fasten the glass down, the heads of the bolts in the straps being inserted in the T-slots in strips m. The cushions may be made of soft rubber or felt, and may be continuous or consist of series of pyramids or cones. By means of these cushions the danger of breaking large sheets of glass, which are slightly irregular, by clamping them between rigid fiat surfaces is obviated.

The part B, to which the grinding-frame is pivoted, is fitted to slide in the raised part a of the base and is adjusted toward the glass by a screw 0, Fig. 3, turned by a hand-wheel 1). It has an upright head 0, in which is a slotted are 1), through which a bolt q passes into the grinding-frame to hold the same in the desired position.

The grinding-frame L (shown in Fig. 1 and in section in Fig. 3) has four arms, in which two shafts d have their journals, and turns on a bolt or pin 1) in the part B. The wheelshafts are free to move endwise, and have a collar a and a spring 0 between the journals to hold the wheels against the glass by springpressure. The advantage of this arrangement is that the glass is less likely to fracture than by more rigid contact. The wheels (one of which is for roughening and the other for polishing) may in turn be brought to the work by loosening the clamping-screw in the slotted head and turning the frame. The pulleys are placed outside of the journals for convenience in changing belts. A hopper, (not shown in the d rawings,) when sand and water is used on cast-iron wheels for roughening, may be placed above the grinding-frame and the sand fed down onto the wheel, and a tank may be placed below the wheel to catch the sand as it comes from the wheel.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a glass-beveling machine, a reciproeating table, in combination with a rotary grinding-disk secured to turn upon shafts having endwise play, said shafts being mounted in bearings arranged to move in a direction at right angles to the axes of the disks, in the manner and for the purpose described.

2. In a glass-beveling machine, a glass-supporting table, in combination with a tilting frame provided with a grinding-disk, in the manner and for the purpose substantially as described.

In a glass-beveling machine, the combination of an adjustable glass-supporting table, a tilting frame adjustable toward and from said table, spring'actuated grinding and polishing disks mounted in said frame, and means, substantially as described, for locking the frame at different inclinations, as and for the purpose set forth.

4. In a glass-beveling machine, aglass-supporting table, in combination with a tilting frame carrying a grinding and polishing disk arranged to successively operate upon the glass in the manner and for the purpose described.

5. In a glass-beveling machine, the combination of reciprocating carriage, a glass-supporting table having a toothed segment, a pinion engaging the segment, pawl-and-ratchet mechanism for locking said pinion, mechanism, substantially as described, for reciprocating said table, clamps for holding the glass upon the table, and adjustable spring-actuated grinding-disks, all arranged and adapted to operate in the manner and for the purpose set forth.

6. In a glass-beveling machine, an adjustable glass-supporting table, in combination with clamps adj ustably secured to the table, and a ledge upon the lower portion of the table, arranged and adapted to operate in the manner and for the purpose substantially as described.

7. The combination of adjustable springactuated grinding and polishing disks, a reciprocating frame having a glass-supporting table adj ustably pivoted thereto, means, substantially as described, for adjusting the lower portion of the table toward and away from said. frame, a rack and pinion actuated by a train of gears, whereby the table is reciprocated, a pair of dogs secured to move with the table, a slidehaving a lug arranged to be engaged by the dogs, and reversing mechanism connected with and operated by the slide, all arranged and adapted to operate in the manner and for the purpose substantially as described.

Signed at Brooklyn, in the county of Kings and State of New York, this 13th dayof June, A. D. 1889.

RICHARD REEVE NEWTON.

\Vitnesses:

J. MCKEAGE, I). C. CAMPBELL. 

